贺小岗, 关国雄. 钢筋销栓模型及其在深梁分析中的应用[J]. 工程力学, 2001, 18(1): 96-102.
引用本文: 贺小岗, 关国雄. 钢筋销栓模型及其在深梁分析中的应用[J]. 工程力学, 2001, 18(1): 96-102.
HE Xiao-gang, KWAN Kwok-hung. A MODEL FOR DOWEL ACTION OF REINFORCEMENT BARS AND ITS APPLICATION TO DEEP BEAM ANALYSIS[J]. Engineering Mechanics, 2001, 18(1): 96-102.
Citation: HE Xiao-gang, KWAN Kwok-hung. A MODEL FOR DOWEL ACTION OF REINFORCEMENT BARS AND ITS APPLICATION TO DEEP BEAM ANALYSIS[J]. Engineering Mechanics, 2001, 18(1): 96-102.

钢筋销栓模型及其在深梁分析中的应用

A MODEL FOR DOWEL ACTION OF REINFORCEMENT BARS AND ITS APPLICATION TO DEEP BEAM ANALYSIS

  • 摘要: 本文提出了一个用于有限元分析的钢筋销栓作用模型。该模型采用分布模式来处理钢筋的横向销栓力和横向变形,以便与钢筋的整体式模型和混凝土的分布裂缝模型相协调。在有限元分析中采用了位移控制的割线刚度迭代法,可以进行荷载位移曲线下降段的分析计算。对深梁试件的分析表明,本文提出的钢筋混凝土模型可以准确分析试件的荷载变形特性。同时发现,纵向主筋的销栓作用对深梁的承载力和变形能力都有重要的影响。

     

    Abstract: The dowel action of reinforcing steel bars crossing cracks is modeled for the finite element analysis of reinforced concrete. In the proposed model, the dowel forces and displacements are smeared over the element respectively in order to be consistent with the smeared crack and reinforcement models. The dowel action model is incorporated in a finite element procedure with displacement controlled iteration scheme and secant stiffness formulation, so as to deal with the post-peak behavior of reinforced concrete structures. The analytical results on deep beams agree closely with test data. It is concluded that the dowel action of reinforcing main bars has a significant contribution to the strength and ductility of shear critical members.

     

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